Lime kiln



June 27, 1933.

w.' J. KuNTz LIME KILN 7 Sheets-Sheet 1 Filedl Jan. 28, 1930 WN En.,

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LIME KILN Fil'ed Jan. 28, 1930 7 Sheets-Sheet 2 ATTORNEY 7 Sheets-Sheet3 w.- J. KUNTZ LIME KILN Filed Jan. 28, 195o June 27, 1933.

WITNESS 'June 27, 1933.

W. J. KUNTZ LIME KILN 7 Sheets-Sheet 4 Filed Jan, 28, 30

INVENTOR WCZUW IZ) WITNESS ATTOR N EY June 27, 1933.

LIME KILN Filed Jan. 28, 1930 '7 Sheets-Sheet 5 Vl E N Dn O T T A w.JfKUN-rz LIME KILN June 27, 1933.

7 Sheets-Sheet 6 Filed Jan.

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WITNESS ATTORNEY Jim@ 27, 1933. w. J. KUNTz 1,915,322

LIME KILN Filed Jan. 28, 1930 v'7 Sheets-Sheet '7 l INVENTOR WITNESS lW'gunz/ ATTORN EY Patented .lune 27, 1933 PATENT OFFICE WILLIAM JACOBKUNTZ, F YORK, PENNSYLVANIA LIME KILN Application led January 28, 1930.Serial No. 424,029.

T his invention relates to a kiln for t-he automatic and continued feedand discharge of burning lime.

An object of the invention is the provision of a kiln for burning limeor other materials and more particularly to means for supporting lime orother materials in the kiln, during burning, for facilitating theirwithdrawal after burning in such a. manner as to secure a continuous ornearly continuous How through a kiln of the vertical or tower type.

, Another object of the invention is the provision of an improved Vkilnwhich Iwill overcome the disadvantages present in kilns of the towertype now in use in which attempts have been made to withdraw the burnedmaterial continuously therefrom, the disadvantages arising in large partby reason of the weight. of the material. in the kiln being supportedupon the discharging mechanism.

Another object of the invention is the provision of a 'kiln having meanstherein to support the material in and above that part of the kiln wherecombustion is taking place, said means including a downwardly converging'funnel-shaped bottom with restricted openings to provide a tortuouspath for the materials and fuel, beneath the funnelshaped bottom beingsupported an outlet valve for drawing offburned material at a regularand regulated rate, without per-- mitting the passage of airtherethrough, baffles being employed in the cone supported in a. conicalbottom to prevent. packing of the material in said bottom or the spacebeneath it, a central supporting pillar being vemployed in co-operationwith the baies which is likewise supported on the cone and the batlies,the cover having inlets for air for combustion.

This invention will be best understood` from a consideration of thefollowing detailed description, in View of the accompanying dra-wings/forming a part of the specification; nevertheless, it is to beunderstood that the invention is not confined to the disclosure. beingsusceptible of such changes and modificationsk which shall definenomaterial departure from the salient features of the invention asexpressed in the appended claims. f

In the drawings:

Figure 1 is a vert-ical section of the kiln constructed in accordancewith the principles of my invention, v

Figure 1a is a vertical section of the upper part of the kiln vforming acontinuation of the section shown in Figure 1,

Figure 2 is a vertical section taken along the line 2-2 of Figure 5,

Figure 3 is a vertical section of the charging hopper detached from thekiln,

Figure 4 is a plan view of the hopper shown in Figure 3, e

Figure 5 is a horizontal section taken along the line 5 5 of Figure 2,

Figure 6 is a horizontal section taken along the line 6-6 of Figure 2, u

Figure 7 is a horizontal section taken along fm the line 7-7 of Figure2,

Figure 8 is a plan view of thef air nozzle and plates shown in Figure 2,

Figure 9 is a fragmentary vertical section taken along the line 9.-9 ofFigure 8,

Figure 10 is a vertical section taken along the line 10-10 of Figure 8,y v,

Figure 11 is a vertical section taken along the line 11-11 of Figure 8,

Figure 12 is a fragmentary enlarged vergf, tical section of an upperplate of the valve construction which houses the revolving wiper arm,

Figure 13 is a horizontal section taken along the line 13-13 of Figure2, and a Figure 14;` is a vertical section taken 'along the line 14-14of Figure 5.

Referring more particularly to Figure 1 yof the drawings it will be seenthat a View in elevation ofthe entire structure is disoo closed whichis, completed by Fig. la. The kiln per se consists of an outer metallicshell 2() having an inner lining 21 formed of fireresistant material ofwell known construction and the shell and inner lining rests upon o5 afoundation 22 formed of concreteor other suitable material and thisfoundation includes a discharge chamber 23.

The exterior of the kiln is provided with the usual balconies 26 locatedat various hor- 100 hopper 36 mounted on top of the kiln.

illustrated more particularly in Figures 3v izontal levels which arereached by means ofy stairways 27.

An inclined framework, generally designated by the numeral 28, issupported at its lower end in a pit 29 while at theupper end, as shownat 30, it is connected with a post 31 secured to the topof the kiln.This framework is further braced by certain of the balconies whichextend laterally from the kiln. The framework supports travelingcarriers 32 which are driven by means of a drum or pulley 33 which isrevolved by means of a chain or belt 34 driven in turn by a pulley 33.An electric motor 35 drives the pulley 33B.

As the materials are carried upwardly by the traveling carrier 32 theyare deposited in a continuous and uniform manner into the and 4 thishopper has an upper section 37 formed of sheet metal which has a.portion 38 extending beyond the confines of'the reduced'stack or inlet39. The lower portion l the neck into the kiln shall be distributed inthe kiln as regularly as possible and shall not pile up at oneside ofthe kiln higher thanat the other side'. As' the feed takes place at sucha rate that the material neverv 'fills the inlet 39, the hopper portion40 is so shaped that material entering itat one side throughthe chute 38will distribute itself so as to fall into the inlet 39 all around theinner circumference thereof. l This is accomplished by making thediameter of the curved portion 37 and that of the upper portion 40 andthe' width ofthe hopper 36 and portion 38 greater'th'an theJdiameter ofthe top of the inlet 39, thus providing a sloping offset in the -lowerportion 40 of the hopper, indicated at 40, whereby the material fallsinto the lower section from around its circumference when the feed takesplace at normal rate.

Referring more particularly to Figures 1 andi2,vit will be seen that acylindrical air nozzle 50 is, provided within the kiln above thedischarge end of the kiln and is located centrallyl thereof with' theaxis of the nozzle being in alignment with the axis of the kiln. Thisnozzle discharges air radially, for combustion purposes, throughdischarge passages 56 in its circumference, andy/has an inclined`dome-shaped cover 51 upon which rests part of the weight of thematerials which are being v burned in the kiln. This cover is subject toan abrasion and is easily replaced. Said cover is removably mounted onthe nozzle. A base member 52 formed integrally with the nozzle is boltedto supports running across the to of a cone-shaped discharge member 53.The air nozzle has a central chamber 54 whichis adapted to be suppliedwith air from a conduit 55 illustrated more particularly in Figures 8and 9 and which will presently beA explained. The wall of the nozzle isprovided ywith a plurality of slots 56 through which the air isdischarged into the materials of the kiln. A cone-shaped member 57projects downwardly into the air chamber 54 and is adapted to aid incausing the air to move upwardly and outwardly through the dischargepassages 56.

Referring more particularly td Figs. 2, 8, 9, 11 1t will be seen that aplurality of castings in the form ofbales 58 of a particularconiguration'are mounted in the cone-shaped member 53 and are supportedthereby. These bailles are connected to a central core 59 and areremovable from the cone-shaped discharge member. Each baille has adownturned flange 60 and a narrower flange 61 formed at an acute angleto the plate 58. Each baille includes two sections, as shown in Figure8, which are substantially triangular in shape with the section 63 havmga curved lower edge 64. The flange 61 is sheared oit at 65 and engagesthe cone-shaped discharge member 53 as does the edge 64 of the baleS. Itis to be noted that these baffles generally are located at an angle toradii passing there-l through so that the upper edge 66 of each bailleis curved and disposed at a tangent to the periphery of the core 59. l

, The baille 58" is modified to the extent that the air conduit 55 isformed integrally with the baille and is disposed between the angu'arportionembraced by the baille and the flange 61. It will be furthernoted that the conduit extends upwardly through the cone-shaped member53 and follows (a .tortuous path at an angle to the radiuspassingthrough the baille 58' and then extends along a radius as shown at 467and enters the bottom of the air nozzle 50 and 'is in communication withthe chamber 54 of said nozzle.

The upper end of the cone-shaped dis-V char e member 53 is provided withan annular ange 70 which rests upon the members 22 while the lower endisrllafnged, as shown at 72, in Fig. 2, and is secured to a flange 73 ofa connection box 74 which has its upper end in open communication withthe lower end of the discharging cone 53. The connection box opens intoa dlstributing box 7 5 which is secured at its up er end to the junctionbox and extends beyon the confines of said box. lower portion of thedistributing box is con` 4neeted to a flanged cover plate 76.

l The distributing box, illustrated more par- The ticularlyin Figures 1and 2, has a throttle 77 swingably mounted on a hinge 78 and has alnection at 82 with the throttle 77 so that when a hand wheel 7 9a isrevolved the free end 77 a of the throttle may be moved across theopening 80 in the upper plate 76 and aids in regulating the dischargeofthe materials from the connection box through the plate.

Referring more particularly to Figures 2, 7, and 12, it will be seenthat the upper plate consists of a segment having a downturned flange 76 connected to an intermediate plate 83, a portion of the upper platebeing cut away to provide an opening 80.A

A wiper arm 85 is located within the flange portion of the plate 76 andis provided with a hub portion 8 6 secured to a centrally disposed shaft87 which is revolved simultaneously with a lower plate 88 which likewisehas a hub 89 secured to the shaft 87. The wiper arm as shown in Fig. 7,has a bottom flange 89 which moves over the intermediate plate 83 andacross the opening 90 in the intermediate plate. This arm also has avertically disposed flange 91. The outer free end of the arm has acurved portion 85EL for llnoving the materials away from the flange Theplate 88 has an opening 92 and said plate is revolved by a ring gear 93formed integrally with the plate 88 and meshes with a spur gear 94secured to the shaft 95 mounted in an offset housing 96.

The shaft 9,5 is driven by a gear 97 secured to said shaft. The gear 97in turn is driven by a gear 98 which is rigid with a motor shaft99kconnected to a motor100.

The distributing box -7 5is provided with a door 101, as shown moreparticularly in Figures 5 and 14, mounted upon a cup-shaped member 102.A second door 10S-is slidably mounted in guides 104 secured to the sidewall of the distributing box. The door 101 is held in place by means ofbolts 105 and a boss 106 is bolted, at 107, to the door to provide areduced passage through the door.

A cone-shaped discharge member 53 is provided with a plurality ofopenings 108 which are closed by doors 109 held in 110.

A spout 111 is connected adjacent an opening in a housing 112 whichincludes the lower plate 88. The free end of this spout is adapted todischarge the materials from the housing into a conveyor, -screeningdevice, or sizing lapparatus as is well known in the place by cleatsart.

A blower 125 is driven by means of a motor 126 and is adapted to supplyair under pressure through a conduit 127 to the conduit 55 which is incommunication with the air nozzle 50. A branch conduit 114 frpm the airpipe 127 may lead into pipe 115 which has nozzles 116 for directing airinto the body of the kilrr at other points than the nozzle 50.

The operation 'of my device'is as follows:

The limestone and the fuel are fed into the `kiln in practically acontinuous stream, in

proper proportion to Vinsure a suicient amount of fuel, when properlyKburned, to calcine all of the lime, but in no event should there be aconsiderable excess of fuel. Air for combustion is supplied from below.Then theV burning is once well under way the rate of combustion withinthe kiln de pends upon the rate of the air supply. While some latitudeof this rate is permissible, the rate when the kiln is in actualoperation, is maintained practically constant for consider,-

able periods of time. The limeis drawn off If the baliles and centralsupportwith air i nozzles were omitted and air supplied only around theperiphery of the kiln, as at 116, it would not be practical to withdrawthe lime in a satisfactory manner and the withdrawal would not bepractically continuous ,from the entire bottom cross section of the kilnevenif it were practicable to burn it properly because the lime wouldpack in the cone 53 and either not feed at all through 74 or feeddownwardly only a core of imperfectly burned material with some unburnedfuel. The baflies and central support, with air nozzle, thus assist inmaking possible uniform speed (a) by partially supporting the weight ofthe material so that it will not bear downwardly on the valve, (b) byinsuringthat the `downward feed will take place from the entire crosssection of the kiln as material is withdrawn fromr below, and (C) byinsuring by a central supply f air that the burning in the centralportion of the kiln is adequate before downward feed can take place. Thematerials are discharged in a uniform stream through the spout 111 andare treated in a manner which is most suitable for.

the particular purpose.

The wiper arm 85 moves the materials in a circle, forcing said materialsover the openings 90 and v92 so that when said openings aline because ofthe revolving plate 88 sald 4materials will enter the housing 112 andwill be discharged through the spout` 111.

Since the arm revolves in synchronism with the plate 88, the speed ofrotation of said 5f plate will control the output of the kiln. The speedof rotationuoflsaid plate may be varied at will.

Iclaim: p

1. In a lime-kiln, a stack, a fixed discharging cone convergingdownwardly at the bottom of the stack, a centrally disposed air nozzlein communication with a source of air under pressure, a pluralityof'fixed curved plates located below the air nozzle and supported by thecone, the inner ends' of the plates being disposedofi' center relativeto the nozzle, said plates co-operating With'the nozzle for aidingin'supporting the materials in the kiln.

2. In a lime kiln, a stack, a discharging apparatus at the bottom of thestack, including a fixed cone converging downwardly for receiving theburning lime, a lurality of plates supported by the cone an inclined atan angle to the vertical, the upper edges of the plates being curved andterminating at their inner ends at points spaced fromthe axis of thecone,-eacli of said plates being provided with a flange depending fromthe upper curved edge and having an outer portion engaging the innerwall of the cone, the flange being formed at an acute angle to theplate.

3. .In a lime kiln, a stack, a liXed cone converging downwardly at thebottom of the kiln, an air nozzle located centrally of the cone and incommunication with the source of air under pressure, said air nozzlebeing provided with a central chamber, a plurality of. slots in thechamber to permit the escape of air, a dome-shaped member at the top ofthe nozzle,and an inverted conically-shaped member depending from thedome-shaped member and projecting into the air chamber for causing theair to be moved upwardly and at an angle to the horizontal when beingdischarged through the slots.

4. In a lime kiIn, a stack. an inverted discharge cone at the bottom ofthe stack, a circular air nozzle supported above the cone, a pluralityof plates connected together and supported by the walls of the cone,theinner ends of the plates being tangent to a c ircle defined by theair nozzle, said plate having fianges depending from the upper endsthereof, the plates and flanges co-operating with their air nozzle foraiding in supporting the weight of the materials in the kiln.

5. In a'lime kiln, a stack, an inverted discharge cone located at thebottom of the stack, a housing in communication with the lowerrestricted end of the cone' and having an ofi"- set portion beyond thecommunication, a stationary plate having an enlarged opening and 65forming the bottom of the housing, va second an offset portion beyondthe communication, Y

a stationary plate having an enlarged opening and forming the bottom ofthe housing, a second stationary plate spaced from the first-mentionedplate and having a restricted opening located adjacent the offsetportion of the housing, a rotatable plate in contact i with thesecond-inentioned plate and "provided with an opening adapted to bealigned with the opening inthe second-mentioned plate, means forrotating the last-mentioned plate, an arm revolved in synchronism withthe third-mentioned plate and disposed between the first-mentioned andsecond-mentioned plates for moving the materials toward the opening inthe second-mentioned plate. 4 l

7. In a lime kiln, a stack, an inverted discharge cone located at thcbottom of the stack, a housing in communication with the lowerrestricted endA of the cone and having an offset portion beyond thecommunication, a stationary plate having. an enlarged opening andforming the bottoni of the' housing, a second stationary plate spacedfrom the first-mentioned plate and having a restricted opening locatedadjacent the offset portion of the housing, a rotatable plate in contactwith the second-mentioned plate and provided with an opening adapted tolbe aligned with the opening in the second-mentioned plate, means forrotating the lastmentioned plate, and means in the inverted cone foraiding in4 checking the flow of the material through the cone to thehousing.

8. In a lime kiln, a stack, an inverted discharge cone located at thebottom of the stack, a housing in communication with the lowerrestricted end of the cone and having an offset portion beyond thecommunication, a stationary plate having an enlarged opening and formingthe bottom of the housing, a second stationary plate spaced from thefirst-mentioned plate and having a restricted opening located adjacentthe offset portion of the housing, Aa' rotatable plate'in contact withthe second-mentioned platey and provided with an opening adapted to bealigned with the openingrin the secondfmentioned plate, means forrotating the last-mentioned plate, a movable bxffiie .located within thehousing and adapted to be moved across the.v tao vopening in thelirst-mentioned plate for restricting the flow of materials through thefirst-mentioned plate onto the second-menv tioned plate.

9. In a lime kiln, a stack, an inverted discharge cone located at thebottom of the stack, a housing in communication with the lowerrestricted end of the cone and having an offset portion beyond thecommunication, a stationary plate having an enlarged opening and formingthe bottom of the housing,

a second stationary plate spaced from the irst-mentioned plate andhaving a restricted opening located adjacent the oii'set portion of thehousing, a rotatable plate in contact with the second-mentioned plateand provided with an opening adapted to be aligned with the opening inthe second-mentioned plate, means for rotating the last-mentioned plate,a batlie plate hingedly mounted in a vertical plate and having its freeend p'rojecting into the housing, meansfor moving the free end over theenlarged opening in the irst-mentioned plate for restricting the flow ofmaterials from thehousing onto the second-mentioned plate.

10. In a lime kiln, a stack, an inverted discharging cone at the bottomof the stack, a

circular junction box connected with the bottom of the cone, and incommunication with said cone, a housing` in communication with thejunction box having a portion extended beyond the confines of said boxand providing an enlarged storage space for the materials passingthrough the cone and the' junction y box, a plate for the bottom of thehousingand provided with an enlargedopening,` a second plate spaced fromthe first-mentioned plate to form a distributing chamber and providedwith a restricted opening adjacent a portion of the opening in theirst-mentioned plate, an arm movable in the distributing chamber andover the second-mentioned plate for moving the materials in said chambertowards the opening in the second-mentioned plate, a.

rotatable plate located below the first-memtioned plate and providedwith an opening adapted to be aligned with the opening in thesecond-mentioned plate, and means for rotating the arm and thethird-mentioned plate.

11. In a lime kiln, a stack,.an inverted discharging cone at the bottomof the stack, a circular junction box connectedy with the bottom of thecone and in communication with said cone, ahousing in communication withthe junction box having a portion extended beyond the connes of said boxto -provide an enlarged storage space for the materials passing throughthe cone and the junction box, a plate for thebottom of the housing, andprovided with an enlarged opening, a. second plate spaced from therst-men-- tioned plate to form a distributing chamber and provided witha restricted opening adj acent aportion of the opening in thefirst-,inen- WILLIAM JACOB KUNTZ.

